Deep Chandra Studies of Millisecond Pulsars in Globular Clusters

Physics

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Globular Clusters

Scientific paper

The unprecedented sub-arcsecond angular resolution of the Chandra X-ray Observatory has proven to be ideally suited for studies of globular clusters, where ``recycled'' millisecond pulsars are found in great abundance. Deep observations of 47 Tuc, NGC 6397, and M28, totaling over 1 Ms of combined exposure, have greatly improved our understanding of the X-ray properties of these objects. In particular, these surveys have revealed that most millisecond pulsars exhibit faint, soft thermal emission from their heated magnetic polar caps, while ``black widow'' and the peculiar dynamically exchanged binary millisecond pulsars exhibit synchrotron X-rays due to interaction of their relativistic winds with a close binary partner. I will present the results of our X-ray studies of the Galactic population of millisecond pulsars, which offer unique insight into binary evolution, internal globular cluster dynamics, pulsar winds, collisionless shock, and the neutron star equation of state.

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